Immediate disarm after arm

ArduCopter Copter 3.2
1

So I decided I need to rebuild my very first quad that I built about 5 years ago with an entirely new frame and a shiny new PixHawk4.

Long story short, the PixHawk is happy, good gps, compass, barometer, controller calibration, and I can arm it without a problem, but… Within a second of arming, it disarms itself without any messages whatsoever. I have tried disabling all arming checks, no change. Also, I can do the motor tests in FlightPlanner and the motors spin up without issue, so the ESC’s are calibrating and arming.

Any ideas why it would disarm automatically like that?

2

Hey,
This monday i have the same problem that you !!
Have you find the solucion ?
Because i don’t ;-(

thanks

3

I did a full reset, re-flashed the firmware, and then reinstalled everything again, and it worked. So can’t really say which step of that process fixed it.

Good luck!